Abstract: In a combine harvester, a supplementary header drive is provided for driving the header components in reverse as needed, for example, for clearing blockages of crop material in a platform auger or in the feederhouse conveyor. The drive is powered by a hydraulic motor and selectively connected to the header drive system by a hydraulically actuated clutch. Clutch and motor are connected in parallel to the hydraulic power source and components are designed and sized so that the hydraulically actuated clutch engages before the hydraulic motor begins to rotate.

Abstract: In a combine harvester, the chaff discharged from the cleaning shoe is funneled towards the downwardly directed inlet of a pneumatic conveyor and transferred, by the conveyor, to the inlet of a rear mounted straw chopper. In this way, the relatively light chaff material is mixed with heavier straw helping to spread the chaff more widely and uniformly. The upward intake or ingestion at the conveyor inlet aerodynamically screens out undesirably heavy material, allowing it to fall to the ground.

Abstract: Detachable filler strips for a threshing concave are retained by fastener assemblies which, for installation and securing of the filler strip, require access only to the inside of the concave. Each fastener assembly includes a resilient cylindrical body and a threaded fastener for axially compressing the body. In preparation for installation, fastener assemblies are installed in the filler strips and each tightened sufficiently to hold the resilient body nonrotatably (due to friction) against the filler strip. After installation, with the fastener assemblies extending outwards between the concave rods, further manipulation of the fastener from inside the concave expands the body diameter sufficiently to grip the rods and retain the filler strip in the concave.